private void btnEditMonograph_Click(object sender, RoutedEventArgs e)
        {
            var view = new MonographView();
            var monographViewModel = (MonographViewModel)((Button)sender).DataContext;

            monographViewModel.Mode = Mode.Edit;
            view.DataContext        = monographViewModel;
            view.ShowDialog();
        }
        private void btnAddMonograph_Click(object sender, RoutedEventArgs e)
        {
            var view = new MonographView();
            var monographViewModel = new MonographViewModel()
            {
                Researcher = (ResearcherViewModel)DataContext,
                Mode       = Mode.Add
            };

            view.DataContext = monographViewModel;
            view.ShowDialog();
        }